Butt-welding pipe



June 18, 1935.

w. T. MAHLA. E-r AL BUTT WELDING PIPE 'Filed Feb. 10, 1954 Patented June 18, 1935 UNITED STATES PATENT OFFICE BUTT-WELDING PIPE Application February 10, 1934, Serial No. 710,756

Claims.

This invention relates to the production of pipe by heating skelp in a furnace and then passing it through a welding bell, this being generally known to the trade as the butt-welding process. 5 One of the objects is to provide an improved apparatus for applying oxidizing gases to the edges of the heated skelp in such manner that the skelp is not unduly burnt. Other objectsmay be inferred from the following disclosure.

. Referring to the accompanying drawing:

Figure l is a top view of an apparatus embodying the principles of the invention.

Figure 2 is a cross-section from the lines II--II in Figure 1.

Figure 3 is a cross-section from the lines III-III in Figure 2.

Skelp is charged in a furnace I, from which it is drawn when heated and passed through a welding bell 2. The improved apparatus is interposed between this furnace and the welding bell to apply oxidizing gases to the edges of the skelp while leaving the furnace, whereby the temperatures of these edges are materially raised without any undue burning.

This apparatus includes oppositely spaced nozzles 3 having elongated orifices 4 respectively facing each other in parallel relationship. Beside these are other nozzles 5 having orifices 6 which are less elongated than are those first described, these latter orifices also facing each other in parallel relationship, and being alined with these rst described orifices.

Elongated, open-ended chambers 1 are fixed to the ends of the nozzles 3 and 5 so that the orifices 4 and 6 open thereinto. These chambers are slotted to longitudinally receive the edges of the skelp and hold the same in registration with the orifices. The receiving ends of these chambers are widely flared, as is shown at IIJ, for the 40 initial reception of the skelp.

The nozzles 3 are supplied with heated air by way of conduits I I, and the nozzles 5 are provided with a, mixture of air and oxygen by way of conduits I2. These conduits also serve to mount the respective nozzles, the conduits themselves being mounted by swingingarms I3 which are carried by cranks I4 which may be supported by the draw-bench I5, it being understood that the latter is that usually provided.

The various conduits must be, of course, spaced sufliciently to span the draw-bench I5. Their lower` ends come together and fit in larger pipes IIa and I2, which permits variations of the relative spacing of the nozzles and chambers, the cranks I4 swinging to accommodate this, and the (Cl. 20S- 9) telescopic joints provided by the differently sized conduits maintaining communication for the oxidizing gases.

The advantages of this particular apparatus are that the skelp is positively guided between- 5 the nozzles with its edges in registration therewith. Also, the chambers function to shield the other surfaces of the skelp from the gases ejected from the nozzles. Since the nozzles in the chambers may have their relative spacing varied, l0 it is possible to adjust this spacing so that only the surfaces of the edges of the skelp received by these slotted chambers are free to the gases in the latter. That is to say, the chambers function to enclose the gases so that they are confined 15 to the edges of the skelp, and these chambers at the same time function to shield the other surfaces of the skelp from the action of the gases, since only the extreme edge surfaces will project into these chambers when they and the nozzles 20 are properly adjusted.

Although a specific example of the present invention is disclosed in accordance with the patent statutes, it is to be understood that the scope of the invention is not tobe limited thereto, except 25. as defined in the following claims.-

We claim:

1. An apparatus for applying oxidizing gases to the edges of heated skelp, including oppositely spaced nozzles and chambers into which said .30 nozzles open and which are slotted to receive the edges of skelp and hold the same opposite said nozzles.

2. An apparatus for applying oxidizing gases u to the edges of heated skelp, including oppositely 3 spaced nozzles and chambers ito which said nozzles open and which are slotted to receive the edges of skelp and hold the same opposite said nozzles, the latter and said chambers being arranged so that their relative spacing may be varied to permit only the surfaces of the edges of said skelp received by said slotted chambers to be free to the gases in the latter.

3. An apparatus for applying oxidizing gases to the edges of heated skelp, including oppositely 45 spaced nozzles having elongated orifices respectively facing in parallel relationship, other nozzles having less elongated orifices respectively facing in parallel relationship and chambers into r which said orifices open and which are slotted to "0 receive the edges of skelp and hold the same in registration with said orifices.

4. An apparatus for applying oxidizing gases to the edges of heated skelp, including oppositely spaced nozzles having elongated orifices respec- 55 tively facing in parallel relationship, other nozzles having less elongated orices respectively facing in parallel relationship and chambers into which said orifices open and which are slotted to receive the edges of skelp and hold the same in registration with said orifices, the latter and said chambers being arranged so that their relative spacing may be varied to permit only the surfaces of the edges of said skelp received by said slotted chambers to be free to the gases in the latter.

5. An apparatus for applying oxidizing gases to the edges of heated skelp, including oppositely spaced nozzles having elongated orices respectively facing in parallel relationship, other nozzles having less elongated oriices respectively facing in parallel relationship and in alinement with the orifices of the iirst named nozzles, and open-ended chambers into which said orifices open and which are slotted to longitudinally receive the 'edges of skelp and hold the same in registration with said orices, the receiving ends of said chambers being widely ared for the initial reception of the skelps edges and said nozzles and said chambers being arranged so that their relative spacing' may be varied to permit only the surfaces of the edges of said skelp received by said slotted chambers to be free to the gases in the latter.

JAMES LESTER MAUTHE. WALTER T. 

